4) Braham, R. L. and Morris, M. E.(editors): Textbook of Pediatric Dentistry. 2nd. edition (revised reprint), B. C. Decker, Toronto and Philadelphia, 1988.
5) Wright, G. Z., Starkey, P. E. and Gardner, D. E.: Managing Children's behavior in the dental office. C. V. Mosby Co., St Louis, 1983.